Features and Benefits Dual Line Display--Allows you to view two different readings at the same time. Watch Feature: Time (12/24 Hour Settings) -- Target Zone Indicator --Indicates when you are above, below, or within your heart rate target range. Last Exercise File--Shows each user his/her exercise file of time exercised, time in zone, average heart rate, calories burned, total calories burned, and total exercise time. Heart Rates--Records average and/or maximum heart rate for workout. Target Zone : Visible and Audible Alarm in Target Zones-- Calories Burned--Measures the number of calories you use during your workout. Polar OwnZone?--During your warm-up, Polar's technology analyzes your heart's beating to determine a safe and effective heart rate zone for you---your OwnZone. Using this info, the monitor provides two levels of intensity guidance for your workout, indicated by blinking and sounding alarms. Key Specs Model Number: F4 Records Time in Target Zone-- Time of Day -- Stopwatch-- Alarm-- Date Displayed-- Elapsed Exercise Time-- Location of Transmitter: Wrist Location of Receiver: Wrist Transmitter Water Resistant: Up to 30 Meters

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